API Std 5LX

Specification for High-Test Line Pipe, Twentieth Edition, Includes Supplement 1 (1976)
standard by American Petroleum Institute, 03/01/1975

API Spec 1581

Specifications and Qualification Procedures for Aviation Jet Fuel Filter/Separators (API/IP 1581)
standard by American Petroleum Institute, 07/01/2002

API Std 5LX

Specification for High-Test Line Pipe, Twenty-third Edition, Includes Supplement 1 (1981)
standard by American Petroleum Institute, 03/01/1980

API MPMS Chapter 22.7

API Manual of Petroleum Measurement Standards Chapter 22.7, EI HM 77, Testing Protocol for Multiphase Meter, First Edition
Handbook / Manual / Guide by American Petroleum Institute, 01/01/2023